RU2528050C2 - Liquid detergent compositions - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: claimed invention relates to a liquid detergent composition for washing, which contains from 0.5 to 10 wt % of the said composition of peroxide bleach, a sulphonated anionic surface active substance and an amphoteric and/or zwitterionic surface active substance, where a weight ratio of the sulphonated anionic surface active substance to the amphoteric and/or zwitterionic surface active substance is in the range from 2:1 to 1:6, and the composition has viscosity from 200 to 28800 cP at 75°F.

EFFECT: obtaining the liquid bleaching composition with good characteristic of stain removal and with gel-like viscosity without an addition of polymer thickening agents.

10 cl, 3 ex, 2 tbl, 3 dwg

Description

Field of Invention

The present invention is directed to liquid detergent compositions. Such compositions are suitable for use in various washing applications, such as pre-treatment before washing or the full washing of various fabrics to provide stain removal and bleaching characteristics, or for use as a detergent for a hard surface or carpet.

BACKGROUND OF THE INVENTION

Compositions containing bleach for bleaching fabrics and surface treatments are well known in the art. Compositions containing liquid peroxide bleach are widely described in the prior art, especially in laundry applications, as laundry detergents, laundry additives or laundry pretreatments. It is known in the art to use such compositions containing peroxide bleach in washing applications to enhance the removal of hardened stains and contaminants such as grease, coffee, tea, grass, dirt / clay contaminants that are otherwise particularly difficult to remove with a conventional machine the wash.

Although the known liquid aqueous whitening compositions provide some whitening performance when used to treat contaminated tissue, there is room for further improvement in terms of the removal characteristics of various stains, including, for example, greasy stains, and to further improve the whitening performance under various conditions, such as conditions pretreatment, where the liquid composition is carefully applied to the fabric to bleach before rinsing the fabric or is washed, and then polo water.

It is known that the stain removal performance of liquid aqueous compositions containing peroxide bleach can be improved by adding a surfactant or a system of surfactants. For example, liquid whitening compositions having a pH below 7, containing peroxide bleach, a sulfonated anionic surfactant and a second surfactant selected from nonionic surfactants, amphoteric surfactants, zwitterionic surfactants and mixtures thereof are disclosed in WO 00/27971.

However, there are some limitations regarding the convenience of such liquid whitening compositions. In particular, the stain removal characteristic does not yet fully satisfy consumer requirements, and the viscosity of such combinations is generally low, so thickeners, such as polymers, are added to provide a gel-like consistency.

The aim of this invention is to provide a liquid whitening composition, while the composition shows a good stain removal and gel-like viscosity without the addition of polymer thickeners.

It has been found that the goal can be effectively achieved by formulating a liquid whitening composition comprising peroxide bleach, a sulfonated anionic surfactant and an amphoteric / zwitterionic surfactant, wherein the ratio of amphoteric / zwitterionic surfactant to sulfonated anionic surfactant is more than about 0.3. The liquid whitening composition of the present invention exhibits a viscosity of up to 28800 cP without any additional polymer or other thickeners. It was found that a combination of certain surfactants of the present invention can provide both an increase in viscosity and an improvement in stain removal performance.

DETAILED DESCRIPTION OF THE INVENTION

The compositions of this invention are formulated as liquids as opposed to a solid or gas. Fluids include gel and paste forms.

Preferred compositions of this invention have a viscosity of 10 cP or higher, more preferably from 10 cP to 50,000 cP, even more preferably from 10 cP to 3,000 cP at 20 ° C as measured on a Brookfield viscometer at 20 rpm with a No. 4 spindle, if not otherwise indicated. All percentages in this document are by weight unless otherwise indicated.

Preferred liquid compositions of this invention are aqueous and, therefore, preferably contain water, more preferably contain water in an amount of from 60% to 99%, even more preferably from 70% to 98%, and most preferably from 80% to 97.5% by weight the whole composition.

The pH of the liquid composition of the present invention can vary from 1 to 13 and can be adjusted by any acids and bases known to those skilled in the art. Examples of acids and bases are sulfuric acid, hydrochloric acid, nitric acid, phosphoric acid, citric acid, methyl sulfonic acid, sodium hydroxide, potassium hydroxide, alkali metal silicate, monoethanolamine, triethanolamine and the like.

Peroxide bleach

As the first basic element, the compositions of this invention contain peroxide bleach or a mixture thereof. Indeed, the presence of peroxide bleach contributes to the benefits of excellent whitening for these compositions. Suitable peroxide bleaches to be used herein are selected from the group consisting of hydrogen peroxide; water soluble sources of hydrogen peroxide; organic or inorganic peracids; hydroperoxides; diacyl peroxides and mixtures thereof.

As used herein, a hydrogen peroxide source refers to any compound that produces perhydroxyl ions upon contact of said compound with water. Suitable water soluble sources of hydrogen peroxide for use herein include percarbonates, perborates, persilicates, and mixtures thereof. Suitable diacyl peroxides for use herein include aliphatic, aromatic and aliphatic-aromatic diacyl peroxides and mixtures thereof.

Suitable aliphatic diacyl peroxides for use herein are dilauroyl peroxide, didecanoyl peroxide, dimyristoyl peroxide, or mixtures thereof. Suitable aromatic diacyl peroxide for use herein is, for example, benzoyl peroxide. A suitable aliphatic-aromatic diacyl peroxide for use herein is, for example, lauroylbenzoyl peroxide. Such diacyl peroxides have the advantage of being particularly safe for fabrics and colors, while providing excellent whitening performance when used in washing applications.

Suitable organic or inorganic peracids for use herein include: persulfates, such as monopersulfate; peroxyacids such as diperoxide dodecandicarboxylic acid (DPDA); magnesium perphthalic acid; peracetic acid, perlauric acid; perbenzoic and alkyl perbenzoic acids and mixtures thereof.

Suitable hydroperoxides for use herein include tert-butyl hydroperoxide, cumyl hydroperoxide, 2,4,4-trimethylpentyl-2-hydroperoxide, diisopropylbenzene monohydroperoxide, tert-amyl hydroperoxide and 2,5-dimethyl-hexane-2,5-dihydroperoxide. Such hydroperoxides have the advantage of being particularly safe for fabrics and colors, while providing excellent whitening performance when used in washing applications.

Preferred peroxide brighteners herein are selected from the group consisting of hydrogen peroxide; water soluble sources of hydrogen peroxide; organic or inorganic peracids; hydroperoxides; and diacyl peroxides; and mixtures thereof. More preferred peroxide bleaches herein are selected from the group consisting of hydrogen peroxide, diacyl peroxides and mixtures thereof. Even more preferred peroxide bleaches herein are selected from the group consisting of hydrogen peroxide, aliphatic diacyl peroxides, aromatic diacyl peroxides, aliphatic-aromatic diacyl peroxides and mixtures thereof.

Typically, the compositions herein may contain from 0.01% to 20%, preferably from 0.3% to 15%, and more preferably from 0.5% to 10% by weight of the total composition of the specified peroxide bleach or a mixture thereof.

Sulfonated Anionic Surfactant

As a second main ingredient, the compositions of this invention contain a sulfonated anionic surfactant. Suitable sulfonated anionic surfactants for use herein are all those well known to those skilled in the art. Preferred sulfonated anionic surfactants for use herein include alkyl sulfonates, alkyl aryl sulfonates, naphthalene sulfonates, alkyl alkoxylated sulfonates, C6-C20 alkyl alkoxylated straight or branched diphenyl oxide disulfonates, or mixtures thereof.

Suitable alkyl sulfonates for use herein include water soluble salts or acids of the formula RSO3M, where R is a C6-C20 straight or branched, saturated or unsaturated alkyl group, preferably a C8-C18 alkyl group and more preferably a C10-C17 alkyl group, and M represents H or a cation, for example, an alkali metal cation (e.g., sodium, potassium, lithium), or ammonium, or substituted ammonium (e.g., methyl, dimethyl and trimethyl ammonium cations and quaternary ammonium cations, e such as tetramethylammonium and dimethylpiperidinium cations, and quaternary ammonium cations derived from alkylamines such as ethylamine, diethylamine, triethylamine and mixtures thereof, and the like).

Suitable alkylaryl sulfonates for use herein include water soluble salts or acids of the formula RSO3M, where R is aryl, preferably benzyl, substituted with a C6-C20 straight or branched saturated or unsaturated alkyl group, preferably a C8-C18 alkyl group, and more preferably a C10- A C16 alkyl group, and M represents H or a cation, for example, an alkali metal cation (e.g. sodium, potassium, lithium, calcium, magnesium and the like), or ammonium, or substituted ammonium (e.g. cat methyl, dimethyl and trimethyl ammonium ones and quaternary ammonium cations such as tetramethyl ammonium and dimethyl piperidinium cations and quaternary ammonium cations derived from alkyl amines such as ethylamine, diethylamine, triethylamine and mixtures thereof and the like).

By "unbranched alkyl sulfonate" as used herein is meant an unsubstituted alkyl sulfonate, where the alkyl chain contains from 6 to 20 carbon atoms, preferably from 8 to 18 carbon atoms and more preferably from 14 to 17 carbon atoms, and where this alkyl chain is sulfonated at one end.

Suitable alkoxylated sulfonate surfactants for use herein are represented by the formula R (A) mSO3M, wherein R is an unsubstituted C6-C20 alkyl, hydroxyalkyl or alkylaryl group having a straight or branched C6-C20 alkyl component, preferably C12-C20 alkyl or hydroxyalkyl, more preferably C12-C18 alkyl or hydroxyalkyl, A is ethoxy, or propoxy, or butoxy, m is greater than zero, typically 0.5 to 6, more preferably 0.5 to 3, and M represents H or a cation, which may be, for example, a metal cation (e.g., sodium, potassium, lithium, calcium, magnesium, etc.), or ammonium, or substituted ammonium. Alkyl ethoxylated sulfonates, alkyl butoxylated sulfonates, and also alkyl propoxylated sulfonates are contemplated herein. Specific examples of substituted ammonium cations include methyl, dimethyl and trimethyl ammonium and quaternary ammonium cations, such as tetramethyl ammonium and dimethyl piperidinium cations, and cations derived from alkanolamines, such as ethylamine, diethylamine, triethylamine, mixtures thereof and the like. Typical surfactants are C12-C18 alkyl polyethoxylate (1.0) sulfonate (C12-C18E (1.0) SM), C12-C18 alkyl polyethoxylate (2.25) sulfonate (C12-C18E (2.25) SM), C12-C18 alkylpolyethoxylate (3.0) sulfonate (C12-C18E (3.0) SM) and C12-C18 alkylpolyethoxylate (4.0) sulfonate (C12-C18E (4.0) SM), where M is preferably selected from sodium and potassium. A particularly suitable alkoxylated sulfonate includes an alkyl aryl polyether sulfonate.

Suitable C6-C20 alkyl alkoxylated straight or branched diphenyl oxide disulfonate surfactants for use herein are as follows:

,

,

where R represents a C6-C20 straight or branched, saturated or unsaturated alkyl group, preferably a C12-C18 alkyl group and more preferably a C14-C16 alkyl group, and X + represents H or a cation, for example, an alkali metal cation (e.g. sodium, potassium lithium, calcium, magnesium and the like). Particularly suitable C6-C20 alkyl alkoxylated straight or branched diphenyl oxide disulfonate surfactants to be used herein are C12 branched diphenyl oxide disulfonic acid and C16 unbranched diphenyl oxide disulfonate sodium salt.

Preferably, said sulfonated anionic surfactant for use herein is selected from the group consisting of alkyl sulfonates; alkylaryl sulfonates; alkyl alkoxylated sulfonates; C6-C20 alkyl alkoxylated straight or branched diphenyl oxide disulfonates; naphthalenesulfonates and mixtures thereof. More preferably, said sulfonated anionic surfactant for use herein is an alkyl sulfonate. Even more preferably, said sulfonated anionic surfactant for use herein is alkylbenzenesulfonate. Most preferably, said sulfonated anionic surfactant for use herein is C10-C17 alkylbenzenesulfonate.

Typically, the compositions of this invention contain from 0.01% to 25%, preferably from 0.1% to 15%, and more preferably from 0.2% to 7%, by weight of the total composition of the sulfonated anionic surfactant.

The weight ratio of amphoteric / zwitterionic surfactant to sulfonated anionic surfactant may be in the range of about 0.02: 1 to 10: 1, preferably said weight ratio of amphoteric / zwitterionic surfactant to sulfonated anionic surfactant is from about 0.05: 1 to 8: 1, more preferably from about 0.1: 1 to 3: 1. Another aspect of the present invention is the use of a sulfonated anionic surfactant, as described above, in a liquid tissue treatment composition, which compositions provide the benefits of stain removal.

Second surfactant

As the third main ingredient, the compositions of this invention contain a second amphoteric / zwitterionic surfactant.

Suitable amphoteric / zwitterionic surfactants to be used herein include surfactants such as betaine, sulfonated betaine, imidazoline, hydrolyzed imidazoline.

The betaine type has the general formula:

where R ₅ represents H or hydroxylalkyl with 2-3 carbon atoms, or hydroxylpolyethylene oxide. R ₄ represents an alkylene group with 2-3 carbon atoms. R ₃ represents alkyl, hydroxyalkyl or alkylphenyl, saturated or unsaturated with 8-22 carbon atoms. R ₁ and R ₂ represent an alkyl or hydroxylalkyl group with 1-4 carbon atoms, m = 0-5, and n = 1-4.

The type of sulfonated betaine has the general formula:

Where

where R ₆ represents H or OH. R ₅ represents H, or hydroxylalkyl with 2-3 carbon atoms, or hydroxylpolyethylene oxide. R ₄ represents an alkylene group with 2-3 carbon atoms. R ₃ represents alkyl, hydroxyalkyl or alkylphenyl, saturated or unsaturated, with 8-22 carbon atoms. R ₁ and R ₂ represent an alkyl or hydroxylalkyl group with 1-4 carbon atoms, m = 0-5, and n = 0-4.

The imidazoline type has the general formula:

Where

where R ₅ represents H, or hydroxylalkyl with 2-3 carbon atoms, or hydroxylpolyethylene oxide. R ₄ represents an alkylene group with 2-3 carbon atoms. R ₃ represents alkyl, hydroxyalkyl or alkylphenyl, saturated or unsaturated, with 8-22 carbon atoms. R ₂ represents H or OH. R ₁ represents alkylene with 2-3 carbon atoms,

T ₁ = H or —OH, or (TM ⁺ ),

M represents H, an alkali metal, alkaline earth metal ammonium or alkanolammonium, m = 0-5, and n = 0-4.

The type of hydrolyzed imidazoline has the general formula:

where the designations have the same meanings as for the imidazoline type above.

Optional ingredients

The compositions herein may additionally contain various other optional ingredients, such as chelating agents, modifying agents, other surfactants, hydrotropes, stabilizers, bleach activators, solvents, pollution suspension agents, polyamine amine suspending agents, pollution releasing agents, anti-foam systems, radical scavengers, antioxidant, catalysts, dye transfer retarders, rheology modifiers, optics bleaches, perfumes, pigments and dyes.

Other surfactants

The compositions of this invention may additionally contain other surfactants other than those mentioned herein before incorporating second anionic surfactants and / or nonionic surfactants. Typically, the compositions of this invention may contain from 0.01% to 30%, preferably from 0.1% to 25% and more preferably from 0.5% to 20% by weight of the total composition of another surfactant in addition to the sulfonated anionic surfactant an active substance and an amphoteric / zwitterionic surfactant.

Other suitable anionic surfactants to be used in the compositions herein include water-soluble salts or acids of the formula ROSO3M, where R is preferably C10-C24 hydrocarbyl, preferably alkyl or hydroxyalkyl having a C10-C20 alkyl component, more preferably C12-C18 is alkyl or hydroxyalkyl, and M is H or a cation, for example an alkali metal cation (e.g. sodium, potassium, lithium), or ammonium, or substituted ammonium (e.g. methyl, dimethyl and trimethyl cations ammonium and quaternary ammonium cations such as tetramethylammonium and dimethylpiperidinium cations and quaternary ammonium cations derived from alkylamines such as ethylamine, diethylamine, triethylamine, mixtures thereof and the like). Typically, C12-16 alkyl chains are preferred for washing at lower temperatures (for example, below 50 ° C), and C16-18 alkyl chains are preferred for washing at higher temperatures (for example, above 50 ° C).

Other suitable anionic surfactants for use herein are water soluble salts or acids of the formula RO (A) mSO3M, where R is an unsubstituted C10-C24 alkyl or hydroxyalkyl group having a C10-C24 alkyl component, preferably C12-C20 alkyl or hydroxyalkyl, more preferably C12-C18 alkyl or hydroxyalkyl, A is an ethoxy or propoxy unit, m is greater than zero, typically 0.5 to 6, more preferably 0.5 to 3, and M is H or cation, which th can be, for example, a metal cation (e.g., sodium, potassium, lithium, calcium, magnesium and the like. d.), ammonium cation or substituted ammonium. Alkyl ethoxylated sulfates as well as alkyl propoxylated sulfates are contemplated herein. Specific examples of substituted ammonium cations include methyl, dimethyl, trimethylammonium and quaternary ammonium cations, such as tetramethylammonium, dimethylpiperidinium, and cations derived from alkanolamines, such as ethylamine, diethylamine, triethylamine, mixtures thereof and the like. Typical surfactants are C12-C18 alkylpolyethoxylate (1.0) sulfate, (C12-C18E (1.0) SM), C12-C18 alkylpolyethoxylate (2.25) sulfate (C12-C18E (2.25) SM) C12-C18 alkyl polyethoxylate (3.0) sulfate (C12-C18E (3.0) SM) and C12-C18 alkyl polyethoxylate (4.0) sulfate (C12-C18E (4.0) SM), where M is suitably selected from sodium and potassium.

Other suitable anionic surfactants to be used herein also include acyl sarcosinate or mixtures thereof in its acid and / or salt form, preferably the long chain acyl sarcosinates have the following formula:

,

,

where M represents hydrogen or a cationic fragment, and where R represents an alkyl group from 11 to 15 carbon atoms, preferably from 11 to 13 carbon atoms. Preferred M is hydrogen and alkali metal salts, especially sodium and potassium. These acyl sarcosinate surfactants are derived from natural fatty acids and the amino acid sarcosine (N-methylglycine). They are suitable for use in the form of an aqueous solution of their salt or in their acidic form in powder form. Being derivatives of natural fatty acids, these acyl sarcosinates are quickly and completely biodegradable and have good tolerance to the skin.

Accordingly, suitable long chain acyl sarcosinates to be used herein include C12 acyl sarcosinate (i.e., the acyl sarcosinate according to the above formula, where M is hydrogen and R is an alkyl group of 11 carbon atoms) and C14 acyl sarcosinate (i.e. e. the acyl sarcosinate according to the above formula, where M is hydrogen and R is an alkyl group of 13 carbon atoms).

Hydrotropes

As an optional ingredient, the compositions of this invention may contain a hydrotrop. Suitable hydrotropes herein include sulfonated hydrotropes. Any sulfonated hydrotropes known to those skilled in the art are suitable for use herein. In a preferred embodiment, alkylaryl sulfonates or alkylaryl sulfonic acids are used. Preferred alkylaryl sulfonates include sodium, potassium, calcium and ammonium xylene sulfonates, sodium, potassium, calcium and ammonium toluene sulfonates, sodium, potassium, calcium and ammonium cumene sulfonates, sodium, potassium, calcium and ammonium substituted or unsubstituted naphthalenesulfonates and mixtures thereof. Preferred alkylaryl sulfonic acids include xylene sulfonic acid, toluene sulfonic acid, cumene sulfonic acid, substituted or unsubstituted naphthalene sulfonic acid, and mixtures thereof. More preferably, xylene sulfonic acid or p-toluenesulfonate or mixtures thereof are used.

Typically, compositions herein may contain from 0.01% to 20%, preferably from 0.05% to 10%, and more preferably from 0.1% to 5% by weight of the entire sulfonated hydrotrope composition. A sulfonated hydrotrope, if present, contributes to the physical and chemical stability of the compositions described herein.

Chelating agents

The compositions of this invention may contain a chelating agent as a preferred optional ingredient. Suitable chelating agents may be any of those known to those skilled in the art, such as those selected from the group consisting of phosphonate chelating agents, aminocarboxylate chelating agents, other carboxylate chelating agents, multifunctionally substituted aromatic chelating agents, ethylenediamine-N, N'-di-succinic acids or their mixtures.

A chelating agent may be desirable in the compositions of this invention because it allows the ionic strength of the compositions of this document to be increased and thus their stain removal and bleaching characteristics on various surfaces. The presence of chelating agents can also contribute to reducing tissue loss and / or color damage, especially in prewash applications. In fact, chelating agents make inactive metal ions that are present on the surface of fabrics and / or in detergent compositions (pure or diluted), which otherwise will contribute to the decomposition of the peroxide bleach radical.

Suitable phosphonate chelating agents to be used herein may include alkali metal ethane-1-hydroxydiphosphonates (HEDP), alkylene poly (alkylene phosphonate), and aminophosphonate compounds including aminotri (methylene phosphonic acid) (ATMP), nitrilotrimethylene phosphonates, (nitrilotrimethylene phosphonates), and diethylene triamine pentamethylene phosphonates (DTPMP). Phosphonate compounds may be present either in their acid form or as salts of various cations in some or all of their acidic functionalities. Preferred phosphonate chelating agents to be used herein are diethylene triamine pentamethylene phosphonate (DTPMP) and ethane-1-hydroxy diphosphonate (HEDP). Multifunctionally substituted aromatic chelating agents may also be used in the compositions of this document. Preferred compounds of this type in acid form are dihydroxydisulfobenzenes, such as 1,2-dihydroxy-3,5-disulfobenzene.

The preferred biodegradable chelating agent for use herein is ethylenediamine-N, N'-di-succinic acid (especially the (S, S) isomer), or its alkali metal or alkaline earth, ammonium or substituted ammonium salts, ethylenediamine-N, N'-di-succinic acid or mixtures thereof.

Suitable aminocarboxylates to be used herein include ethylenediaminetetraacetates, diethylene triamine pentaacetates (DTPA), N-hydroxyethylethylenediamine triacetates, nitrilotriacetates, ethylenediaminetetrapropionates, acid triethylenetetamine diacetin diethylacetamide di-ethylenedioacetamide diacetamide forms of their alkali metal, ammonium or substituted ammonium salts. Particularly suitable aminocarboxylates to be used herein are diethylene triamine pentaacetic acid, propylene diamine tetraacetic acid (PDTA), and methyl glycine diacetic acid (MGDA).

The following carboxylate chelating agents to be used herein include salicylic acid, aspartic acid, glutamic acid, glycine, malonic acid, or mixtures thereof. Another chelating agent for use herein is represented by the formula:

where R1, R2, R3 and R4 are independently selected from the group consisting of -H, alkyl, alkoxy, aryl, aryloxy, -CI, -Br, -NO2, -C (O) R 'and -SO2R "; where R' is selected from the group consisting of -H, -OH, alkyl, alkoxy, aryl and aryloxy; R "is selected from the group comprising alkyl, alkoxy, aryl and aryloxy; and R5, R6, R7 and R8 are independently selected from the group consisting of —H and alkyl. Particularly preferred chelating agents to be used herein are aminotri (methylenephosphonic acid), diethylene triaminopentaacetic acid, diethylene triamine pentamethylene phosphonate, 1-hydroxyethane diphosphonate, ethylenediamine-N, N'-di-succinic acid, and mixtures thereof.

Typically, the compositions of this invention may contain up to 5%, preferably from 0.01% to 1.5% by weight, and more preferably from 0.01% to 0.5% by weight of the entire chelating composition.

Anti-foam system

The compositions of this invention may further comprise an anti-foam agent or a mixture thereof. Any defoaming agents known to those skilled in the art are suitable for use in this document. In a preferred embodiment, an anti-foam system is used comprising a fatty acid together with a capped alkoxylated nonionic surfactant, as defined hereinafter, and / or silicone.

Typically, the compositions herein may contain from 1.10-4% to 10%, preferably from 1.10-3% to 5%, and more preferably from 1.10-2% to 5% by weight of the total fatty acid composition.

Typically, compositions herein may contain from 1.10-3% to 20%, preferably from 1.10-2% to 10%, and more preferably from 5-10-2% to 5% by weight of the entire composition of the capped alkoxylated nonionic surfactant an active substance as defined herein.

Typically, the compositions herein may contain from 1-10-5% to 5%, preferably from 1.10-6% to 1%, and more preferably from 1.10-4% to 0.5% by weight of the entire silicone composition.

Suitable fatty acids for use herein are alkali metal salts of a C8-C24 fatty acid. Such alkali metal salts include fully saturated metal salts, such as sodium, potassium and / or lithium salts, as well as ammonium and / or alkylammonium salts of fatty acids, preferably a sodium salt. Preferred fatty acids for use herein contain from 8 to 22, preferably from 8 to 20, and more preferably from 8 to 18 carbon atoms.

Suitable fatty acids may be selected from caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, and mixtures of fatty acids suitably cured from natural sources such as vegetable or animal esters (e.g. palm oil , coconut oil, soybean oil, castor oil, fat, peanut oil, whale and fish oils and / or Babassu oil).

Suitable capped alkoxylated nonionic surfactants for use herein are represented by the formula: R1 (O-CH2-CH2) n- (OR2) mO-R3, where R1 is a C8-C24 straight or branched alkyl or alkenyl group, an aryl group , an aralkyl group, preferably R1 represents a C8-C18 alkyl or alkenyl group, more preferably a C10-C18 alkyl or alkenyl group, even more preferably a C10-C15 alkyl group; where R2 is a C1-C10 straight or branched alkyl group, preferably a C2-C10 straight or branched alkyl group, preferably a C3; where R3 represents a C1-C10 alkyl or alkenyl group, preferably a C1-C5 alkyl group, more preferably methyl; and where n and m are integers independently varying in the range from 1 to 20, preferably from 1 to 10, more preferably from 1 to 5; or mixtures thereof.

Suitable silicones for use herein include any silicones and mixtures of silica and silicone. Silicones can usually be represented by alkylated polysiloxane materials, while silica is usually used in finely divided forms, which are silica gels, xerogels and hydrophobic silicas of various types. These materials may be included as solid particles in which silicone is preferably releaseably incorporated into a water-soluble or water-dispersible, substantially non-surface active, detergent-impervious carrier. Alternatively, the silicone may be dissolved or dispersed in a liquid carrier and spray applied to one or more other components.

In fact, in industrial practice, the expression "silicone" has become a general expression that encompasses a variety of relatively high molecular weight polymers containing siloxane units and various types of hydrocarbyl groups. The silicone compounds disclosed herein are suitable in the context of this invention. Generally, silicone compounds can be described as siloxanes having a general structure:

where n is from 20 to 2000, and where each R independently may be an alkyl or aryl radical. Examples of such substituents are methyl, ethyl, propyl, isobutyl and phenyl. Preferred polydiorganosiloxanes are polydimethylsiloxanes comprising trimethylsilyl terminal blocking units and having a viscosity at 25 ° C. of 5 x 10-5 m ² / s to 0.1 m ² / s, i.e. the value of n varies from 40 to 1500. This is preferable because of their easy availability and their relatively low cost.

A preferred type of silicone compounds useful in the compositions herein comprises a mixture of an alkylated siloxane, the type disclosed above and solid silica.

Solid silica can be a highly dispersed silica, precipitated silica or silica obtained by gel formation technique. The silica particles can be hydrophobic when treated with dialkylsilyl groups and / or trialkylsilane groups bonded either directly to silica or through a silicone resin. A preferred silicone compound includes hydrophobic silane, most preferably trimethylsilane silica having particles ranging in size from 10 mm to 20 mm and a specific surface area above 50 m ² / g. The silicone compounds used in the compositions of this invention accordingly include an amount of silicon oxide in the range of 1 to 30% (more preferably 2.0 to 15%) by weight of the total weight of the silicone compounds, which results in silicone compounds having an average viscosity in the range from 2 x 10-4 m ² / s to 1 m ² / second. Preferred silicone compounds may have a viscosity in the range of 5 x 10-3 m ² / s to 0.1 m ² / s. Especially suitable are silicone compounds with a viscosity of 2 x 10-2 m ² / s or 4.5 x 10-2 m ² / s.

Radical scavenger

The compositions of this invention may contain a radical scavenger or a mixture thereof. Suitable radical scavengers for use herein include well-known substituted mono- and dihydroxybenzenes and their analogs, alkyl and aryl carboxylates, and mixtures thereof. Such preferred radical scavengers for use herein include di-tert-butylhydroxytoluene (BHT), hydroquinone, di-tert-butylhydroquinone, mono-tert-butylhydroquinone, tert-butyl-hydroxyanisole, benzoic acid, toluic acid, catecholate, butyl techolate benzylamine, 1,1,3-tris (2-methyl-4-hydroxy-5-t-butylphenyl) butane, n-propyl gallate or mixtures thereof, and di-tert-butylhydroxytoluene is highly preferred.

Radical scavengers, when used, are typically present herein in amounts varying up to 10% and preferably from 0.001% to 0.5% by weight of the total composition.

The presence of radical scavengers can help to reduce the loss of tensile strength of fabrics and / or color damage if the compositions of this invention are used in any kind of washing, especially in pre-wash.

Antioxidant

The compositions of this invention may further comprise an antioxidant. Typically, the compositions herein may contain up to 10%, preferably from 0.002% to 5%, more preferably from 0.005% to 2% and most preferably from 0.01% to 1% by weight of the total antioxidant composition.

Suitable antioxidants to be used herein include organic acids, such as citric acid, ascorbic acid, tartaric acid, adipic acid and sorbic acid, or amines, such as lecithin, or amino acids, such as glutamine, methionine and cysteine, or complex esters such as ascorbyl palmitate, ascorbyl stearate and triethyl citrate, or mixtures thereof. Preferred antioxidants for use herein are citric acid, ascorbic acid, ascorbyl palmitate, lecithin, or mixtures thereof.

Bleach activator

As an optional ingredient, the compositions of this invention may contain a bleach activator or mixtures thereof. By “bleach activator” as used herein is meant a compound that reacts with hydrogen peroxide to form a peracid. The peracid formed in this way constitutes activated bleach.

Suitable bleach activators to be used herein include those that belong to the class of esters, amides, imides or anhydrides. Examples of suitable compounds to be used herein are tetraacetylethylenediamine (TAED), sodium 3,5,5-trimethylhexanoyloxybenzenesulfonate, diperoxylauric acid and peroxyadipic acid nonylamide and n-nonanoyloxybenzenesulfonate (NOBS). Also suitable are N-acylcaprolactams selected from the group consisting of substituted or unsubstituted benzoylcaprolactam, octanoylcaprolactam, nonanoylcaprolactam, decanoylcaprolactam, undecenoylcaprolactam, propylbenzylprolactam and propylaminoaprolactam. A particularly preferred bleach activator family is acetyl triethyl citrate (ATC). Acetyl triethyl citrate has the advantage of not having an adverse effect on the environment, since it decomposes into citric acid and alcohol. In addition, acetyl triethyl citrate has good hydrolytic stability in the product during storage and is an effective bleach activator. Finally, it provides a good increase in composition potential.

The compositions of this invention may contain from 0.01% to 20%, preferably from 0.1% to 10% and more preferably from 0.5% to 7% by weight of the total composition of the specified bleach activator.

Examples

Example 1: Viscosity

The viscosity of the samples was measured using a Brookfield-RVTD viscometer with spindle No. 4 at 20 rpm and 75F, unless otherwise specified. Table 1 summarizes the results of viscosity measurements for various surfactants and mixtures. For all viscosities less than 20, spindle No. 4 was used at 100 rpm. For sample 4, spindle No. 4 was used at 2.5 rpm.

TABLE 1 Summary Viscosity Results for 13 Different Samples

one 2 3 four 5 6 7 8 9 10 eleven 12 13 Cocamidopropyl Betaine (amphoteric) 4.00 600 4.00 3.00 2.00 2.00 1,50 4.00 4.00 Sodium alkylbenzenesulfonate (anionic) 1.00 1.00 1.00 1.00 2.00 3.00 4.00 2.00 4.00 2.00 Alcohol ethoxylate 7 EO (non-ionic) 1.00 1.00 2.00 C16 pyridium chloride (cationic) 1.00 Fatty alcohol sulfate (anionic) 1.00 2.00 Sodium Citrate 2.19 2.19 2.19 2.19 2.19 2.19 2.19 2.19 2.19 2.19 2.19 2.19 Sodium Sulfate 3.00 NaOH to final pH Water up to 100 up to 100 up to 100 up to 100 up to 100 up to 100 up to 100 up to 100 up to 100 up to 100 up to 100 up to 100 up to 100 Total surfactant content 4.00 7.00 5.00 4.00 3.00 4.00 4,50 5.00 5.00 5.00 4.00 5.00 4.00 Amphoteric / Sulfonate Ratio 4/0 6/1 4/1 3/1 2/1 1/1 1/2 Viscosity (centipoise) at 75 ° F at pH 2 2430 PH 3 4200 6 6 8 12 PH 4 1100 PH 7 3 1750 3150 1400 200 340 four 10 10 10 8 12 PH 10 28800 PH 12 3120 1500 fourteen eighteen 8 12

The data in Table 1 show the high viscosity provided by the combination of amphoteric and sulfonated anionic surfactants of the present invention. Samples 2-7 show that at low levels of total active surfactant from 3% to 7%, a combination of amphoteric and sulfonated anionic can result in high viscosity from 200 to 28800 cP without the need for additional viscosity enhancers such as polymer thickeners. An amphoteric surfactant alone (sample 1) or a combination of an amphoteric surfactant and a nonionic or cationic surfactant (samples 8 and 9) does not produce comparable high viscosities. Samples 10-13 show that the combination of a sulfonate surfactant with a nonionic or other anionic surfactant does not give the high viscosity provided by the combination of the present invention.

Example 2: Pre-stained Detergent Test

A 1 ml sample of the composition or commercial bleaching agent was placed in the center of the stain area of the garment with a stain and allowed to settle for 10 minutes. Clothes pretreated with the same sample were washed in a washing machine with a detergent made in the laboratory. After a normal wash and rinse cycle, the clothes were dried and the readings were read by a Spectraflash SF650X stain reader. DE * difference is the difference between the stain read before and after washing. The larger the difference DE *, the better the cleaning effect of the product. The data shown in Figure 1 summarizes the results. The DE * differences in Figure 1 are the average of 4 replicates for each stain type.

Figure 1 shows the detergency with respect to the “pre-applied spot” composition of sample 14 with amphoteric and sulfonate in comparison with the commercial treatment of the pre-applied spot under the same test conditions. From Figure 1 it can be seen that the composition of the sample 14 in accordance with this invention as a means of processing pre-applied stains works better in relation to stains of chocolate, coffee, grape juice, herbs, red wine and tea than a commercial product.

Example 3: Washing ability when fully washed

48.0 grams of laboratory-made detergent (sample 15), a combination of 48.0 grams of laboratory-made detergent (sample 15), with 96 grams of commercial bleaching agent, and a combination of 48.0 grams of sample 15, with 48.0 grams of sample 14 (in accordance with this invention) was placed in standard washing machines and was washed using the test washing process described above for “Pre-stained washing ability”. The results are summarized in Figures 2 and 3. Figure 2 compares the washing ability of a combination of a detergent made in a laboratory and a commercial bleaching agent compared to a combination of a detergent made in a laboratory and a composition in accordance with this invention. Figure 3 compares the washing ability of a detergent made in a laboratory, in comparison with a combination of a detergent made in a laboratory and the composition according to the invention.

Figure 2 shows that the combination of the present invention (sample 14) with a laboratory-made detergent (sample 15) provides a better washing ability than the combination of a laboratory-made detergent (sample 15) and commercial bleaching agent on stains of chocolate, coffee, grape juice, red wine and spaghetti sauce.

Figure 3 shows that the combination of the present invention (sample 14) with a detergent made in the laboratory (sample 15) provides better washing ability than the detergent made in the laboratory (sample 15) on spots of chocolate, coffee, grass, potted soil, red clay, red wine and spaghetti sauce when used in combination with a detergent made in the laboratory (sample 15).

The compositions of samples 14 and 15 are shown in Table 2.

table 2

Sample 14 Sample 15 Cocamidopropyl Betaine 4.00% Sodium alkylbenzenesulfonate 0.27% 3.00% Alcohol Ethoxylate-3-Sulfate Sodium 2.73% 5.00% C12 alcohol ethoxylate 7 EO 5,000% Coco fatty acid 2.00% Sodium Citrate 0.67% 2.02% Tetrasodium iminodisuccinate 0.50% Fluorescent dye 0.20% Limonene ,twenty% Peroxal CG-HP (H ₂ O2) 7.60% 7.60% Perfume 0.20% Other 0.50% Water up to 100% up to 100%

Claims (10)

1. A liquid detergent composition for washing containing from 0.5 to 10% by weight of the specified peroxide bleach composition, a sulfonated anionic surfactant and an amphoteric and / or zwitterionic surfactant, where the mass ratio of sulfonated anionic surfactant substances to amphoteric and / or zwitterionic surfactant is in the range from 2: 1 to 1: 6, and the composition has a viscosity of from 200 to 28800 cP at 75 ° F. 2. The composition according to claim 1, where the specified peroxide bleach is from 2 to 8% by weight of the specified composition. 3. The composition according to claim 1, where the specified peroxide bleach selected from the group consisting of hydrogen peroxide, water-soluble sources of hydrogen peroxide, organic peracids, inorganic peracids, hydroperoxides, diacyl peroxides and mixtures thereof. 4. The composition according to claim 1, where the sulfonated anionic and amphoteric / zwitterionic surfactants comprise from 1% to 20% by weight of the specified composition. 5. The composition according to claim 1, where the sulfonated anionic and amphoteric / zwitterionic surfactants comprise from 1.5% to 15% by weight of the specified composition. 6. The composition according to claim 1, where the sulfonated anionic and amphoteric / zwitterionic surfactants comprise from 2% to 10% by weight of the specified composition. 7. The composition according to claim 1, wherein said sulfonated anionic surfactant is selected from the group consisting of alkyl sulfonates, alkyl aryl sulfonate, naphthalene sulfonates, alkyl alkoxylated sulfonates, C6-C20 alkyl alkoxylated straight or branched diphenyl oxide disulfonates and mixtures thereof. 8. The composition according to claim 1, where the specified sulfonated anionic surfactant is sodium alkylbenzenesulfonate. 9. The composition of claim 1, wherein said amphoteric / zwitterionic surfactant is selected from the group consisting of carboxylated betaine surfactants, sulfonated betaine surfactants, imidazoline surfactants , surfactants based on hydrolyzed imidazoline and mixtures thereof. 10. The composition of claim 1, wherein said amphoteric / zwitterionic surfactant is cocamidopropyl betaine.

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